DE2207288A1 - BRUSHES AND METHOD OF MANUFACTURING THEREOF - Google Patents

Description

DR. ING. E. HOFFMANN · DIPL. ING. W. EITLE DR. RER. NAT. K. HOFFMANN PATENT ADVOCATE «

D-8000 MÖNCHEN 81ARABELLASTRASSE 4 TELEPHONE (0811) 911087

Helena Rubinstein, Inc., of New York, N.Y. / UNITED STATES

Brush and method of making it

The invention relates to a brush consisting of an axially extending from the front end of a tubular Part of extending tuft of hair. In particular, it relates to paint brushes designed to cover the front portion of application devices can form, which for applying liquid masses, such as lipstick color and decorative eye cosmetics, hereinafter called mascara, on the corresponding parts of the face Person used.

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So far, small brushes, such as those used to apply lipstick, were with the Mass production associated with difficulties, which is why relatively high costs were incurred. The bristles of the brush loosen and get lost, which limits the life of the brush.

According to the invention, a brush of the type described at the outset is created, which is characterized by is that an inner part is arranged within an outer part at a distance therefrom, and that the tuft of hair is fixed within the annular space between the inner and outer parts, wherein a brush section extends axially beyond both parts.

Furthermore, according to the invention, a method for producing a brush of the type mentioned above is created, which is characterized in that the brush hairs are inserted into the outer part so that they are axially Extending over the front end of the outer part that the inner part with a separator disposed therein in the is inserted essentially coaxially into the outer part, with the hairs of the brush facing forward extending end are attached between the inner and the outer part, and that then the separator from the inner part is removed.

The invention is explained and described in more detail below, reference being made to the accompanying drawings will. Show it:

Fig. 1 is a longitudinal section through a cosmetic

Applicator with a brush at its front end, the front end in side elevation is shown;

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2 shows an enlarged longitudinal section through the front end of the application device the line 2-2 from Fig.l;

Fig. 3 is a longitudinal section along the line 3-3 of Fig. 2;

FIG. 4 is an enlarged sectional view taken along the line 4-4 from FIG. 3; FIG.

FIG. 5 is an enlarged cross-section taken along line 5-5 of FIG. 3j

Figure 6 is an enlarged cross-section taken along line 6-6 of Figure 3;

7 shows a longitudinal section through a device used when assembling the individual parts of the brush, the parts being shown in side elevation and arranged in the apparatus.

8 shows an enlarged longitudinal section through the front end of the forming part of the applicator brush Nozzle with the representation of an embodiment of a separator arranged therein;

FIG. 9 is a view similar to FIG. 8 showing a further exemplary embodiment of a separating piece at the front end of the nozzle;

FIG. 10 shows a cross section along the line 10 from FIG. 9;

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Pig.11 is a sectional view through the in Fig. 9 and

10, the manner in which the separator after assembly the nozzle within the brush and the housing or the end ring or drilled Will get removed.

In the drawing, a brush assembly IQ is shown which forms the front end of a dispensing device 11 which comprises an elongated, cylindrical main part or a container 12 with a front tip IJ> through which a creamy or liquid mass M, for example lipstick paint, from the container is delivered. The front tip has an end ring or extension 14 of the brush which is press fit thereon. The end of the end ring communicates with a front shoulder 15 on which a nozzle 16 is arranged within the end ring 14 so that its / rear end, the nozzle head 17 "is press-fitted into the end ring, the rear end of the DUsenkopfes with the end of the tip 13, and the front end of which is in engagement with spaced apart flanges 18 in the end ring. The nozzle has an outlet or an opening 19 at its front end which extends forward in front of the opening 20 of the end ring. A tiny tuft of hair 21, or a brush-like arrangement, is arranged between the nozzle 16 and the end ring 14 so that it extends forward beyond the nozzle opening 19, so that the liquid mass M in the container through the nozzle channel 22 and can be dispensed into the brush section 21a extending in front of this.

If the device is not used, the Brush assembly and the front end of the container a cylindrical closure 23 with an end wall 24 are pushed, its rear section with a section 25 of the container is in frictional engagement with a smaller outer diameter,

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while the rear end of the closure rests against a shoulder 26 arranged on the container. Will the dispenser is used, the closure ^ can easily be removed from the container be stripped off.

Above the liquid mass M a piston 27 is arranged in the container 12, which has a main part 28, the front section 29 of which tapers towards the outlet end of the container so that it corresponds to the tapering of the front section 30 of the container located near the tip 13. The rear portion of the main piston part includes an end wall 31 disposed on its periphery which is forwardly directed and slidably sealable against the inner cylindrical wall 32 of the container so that the liquid mass is prevented from leaking rearwardly beyond the piston when the piston to the front in the dispenser: »ehtung is pushed. This seal is in frictional engagement with the stylish container wall so that it resists rotation of the piston therein. The main part 28 of Liolbert has a mount 33 arranged therein, Helene extends from a front wall y of the piston and opens through the rear end of the piston. On this mount, non-circular - for example hexagonal - inner walls 35 arranged at a distance from one another in the longitudinal direction are arranged, which are separated from one another by an inner strip 36 running around the circumference of the mount. These walls 35 receive the front section 37 of an elongated, externally threaded shaft 38, this front section having corresponding hexagonal end faces 37a which are spaced apart in the longitudinal direction and which fit exactly into the hexagonal walls 35 of the piston. The hexagonal end faces are separated from one another by a circumferential recess 39 which can accommodate the strip 36.

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The parts shown in the drawing preferably exist made of synthetic resins with sufficiently high elasticity, so that the front portion 37 of the screw shaft 38 in the Socket can be wedged in, with the center bar and the rear bar 36a following the socket sufficiently bend outward so that the hexagonal end faces 37a of the stem are within the corresponding hexagonal piston walls 35 can be arranged. For example, the piston can be made of polyethylene, during the The screw shaft is made of acetal. Most of the screw shank is preferably left-handed Provided external thread, which is preferably provided with several, for example two, threads.

A threaded ring 40 cooperates with the screw shaft 38 to move the piston 27 forward into the container 12 to move that the liquid mass contained therein is dispensed through the outlet end of the container. From the drawing it can be seen that the threaded ring comprises a hollow drive shaft which is rotatably mounted in the container 12 and cannot perform any axial displacement with respect to it. The front end 42 of the hollow shaft has internal threads, for example, left-hand thread, which engages with the left-hand external thread of the screw shaft stand. The portion of the hollow shaft that lies behind the end is not in line with the one provided with the screw thread Shank engaged with the hollow shaft extending past its front end 42 and in an enlarged disc-shaped part or a drive pulley 43 ends which extends behind the rear end of the container 12. The disk has an edge section 44 with small ridges 44a for gripping, as well as an intermediate disk 45 connecting the edge portion to the hollow shaft 41. The disk comprises further a lower rim 46 which extends forwardly into the container 12 and with one along its perimeter

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extending outer recess 47 is provided, which an inwardly projecting, circumferentially extending ledge 48 receives so that a rotational movement the disc and hollow shaft 41 within the container. The one receiving the strip 48 on the container Recess 47 is formed by a shoulder protruding forward and an outer ledge 50 bounded on rim 46, polygamy engages ledge 48 on the container to permit movement of disc 43 and integral therewith designed to prevent hollow drive shaft in both directions on the longitudinal axis.

The rotational movement of the disk 43 is transmitted to the drive shaft 41 formed integrally therewith and to the internal thread of the front end 42 of the shaft. Such a rotational movement causes the screw shaft 38 and the piston 27 to move in the longitudinal direction, the frictional engagement between the end wall J> 1 and the container preventing a rotational movement of the piston and the screw shaft. Thus, when the disk 43 and the drive shaft 41 are rotated clockwise, the screw shaft 38 and the piston 27 in the container 12 are moved forward, with part of the liquid mass M being pressed through the tip 13 *, the nozzle 16 and into the brush 21 connected to it. When the hollow drive shaft 41 rotates in the opposite direction, the screw shaft 38 and the piston 27 attached to it are moved rearward in the longitudinal direction.

In the particularly described brush arrangement 10, the rear section 14a of the end ring 14 is cylindrical and has an outer flange 60 at its rear end, the inner wall 61 of such a rear section is also cylindrical. The front portion 62 of the hollow member extends from the front end of the rear portion conical and generally oval in shape, as best seen in FIG. The maximum of the larger diameter 63 of the inner wall 64 of the front section can

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substantially correspond to the diameter of the rear inner wall, while the smaller diameter or the minor axis 65 of the oval inner wall essentially is equal to or slightly larger than the diameter of the conical nozzle end 16, where the inner wall merges into the nozzle head 17. This nozzle head corresponds to the inner diameter of the rear inner wall 6l. The tuft of hair 21 within the annular space between the outer wall of the conical nozzle section and the inner one oval wall 64 of the main part has a rear portion 21b, which is also ring-shaped and on the outside is oval shaped. The free brush hairs 21a of the tuft of hair, which in front of the front end or the front Opening 20 of the main part are also arranged in a generally oval shape. The rear portion 21b of the Brush hair is related, for which purpose an appropriate adhesive, agent or glue is used. aside from that are the brush hairs on the conical nozzle 16 and on the oval conical wall 64 of the front section 62 glued on. This anchors them firmly between the nozzle 16 and the end ring 14.

The nozzle channel 22 is free and unobstructed so that the liquid or creamy mass M can flow unhindered out of the container 12 and through the channel, whereupon it is released into the interior of the tuft of hair 21a lying in front of the nozzle outlet or the opening 19. It is important that the outlet opening 19 of the nozzle extends axially in front of the front end 20 of the end ring and beyond this. Because the opening 19 protrudes a considerable distance beyond the outlet opening 20 in the end ring, the liquid or creamy mass that emerges from the nozzle channel 22 cannot emerge laterally near the brush base, but instead flows forward along the length of the brush , whereby the mass is distributed more evenly on the front brush hairs 21a.

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The brush assembly 10 including the end ring 14, nozzle 16 and brush hairs 21 is made by inserting such a tuft of hair through the rear end 14a of the end ring and into the front portion thereof. The rear end of the brush hairs is arranged essentially at the shoulder stops 18 of the housing, against which the nozzle head 17 comes to rest. Then the rear section 21b of the tuft of hair to be connected to the front section 62 of the end ring is provided with a corresponding fine adhesive. The nozzle 16 has a torpedo or initially inserted therein a separator (Fig. ¹ J, 8), which has a cylindrical shank 71, which corresponds to the front cylindrical wall of the nozzle or opening 19. This shaft has a rear extension 71a which extends in the nozzle channel 22 to the rear by a substantial section. The front section 72 of the separating piece is formed into a conical part which has a rear shoulder 73 which comes to rest against the front end of the nozzle 16.

The nozzle 16 with the separating piece 70 arranged therein is inserted through the rear end 14a of the housing, the conical end 72 of the separator being the central Pierced section of the brush hairs 21 and separates this section from each other. This separation occurs when moving forward the nozzle within the hairs of the brush until the head 17 of the nozzle with the flanges 18 on the end ring comes into engagement, thereby increasing the distance that the nozzle opening 19 extends over the front end 20 of the end ring extends forward, is determined. The brush hairs are in this way through the front tip 72 of the The separator then severed while the one on the rear Section 21b of the brush hairs applied adhesive is still moist. As previously described, the rear section the brush hairs firmly on the outer circumference and on the oval wall 64 of the front section of the end ring by the adhesive attached, whereby the individual brush hairs even when creating

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rigid of the adhesive are glued together. The front conical section 72 of the separator is preferably coated with a suitable glue-repellent layer in order to prevent the adhesive from sticking to it. For example, this layer can consist of polytetrafluoroethylene (Teflon), which slides easily along the hairs of the brush and makes it easier to insert the nozzle into it. After the nozzle has been completely inserted into the end ring, the separating piece is made using an appropriate tool (not shown) which is inserted through the rear end of the end ring and the nozzle channel 22 and comes to rest against the rear end of the shaft ¹ Jl of the separating piece , removed. As a result, the channel 22 is left unhindered and without residues, so that there are definitely no obstructions for the flow of the liquid mass. The conical tip 72 closes the front end of the nozzle channel and prevents glue or any other foreign substance from entering it. The head of the nozzle ensures the coaxial alignment of the same within the end ring 14, since its outer diameter corresponds to the inner diameter of the rear cylindrical wall 61.

In another method of separating the separator located in the nozzle 16, the nozzle can be a front have conical tip 72a (see FIG. 9), which is also coated with polytetrafluoroethylene. One Such a tip represents a good guide for the nozzle 16 into the brush hairs 21, which are arranged in the end ring 14 are, or it facilitates the insertion of the same, while it has the same function as the separator. after the Nozzle 16 is correctly arranged in the end ring 14 and in the brush 21, the conical nozzle tip is drilled out, the DUsenkanal 22 remains free of obstructions (FIG. 11).

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The device shown in Fig. 7 can be used to provide a concentric arrangement of the nozzle and the separator 70, or the nozzle Ιό with its initially integral tip 72a, in the end ring 14 and the brush hairs. The device comprises a suitable frame δθ with spaced apart front and rear arms 81,82. The rear arm 82 has a suitable chuck 83 disposed therein in which a shaft 84 is slidably disposed. This shaft has a forward shoulder and a conical mandrel integrally formed therewith which extends forwardly from the shoulder. The conical course of the mandrel corresponds to that of the inner wall of the nozzle 16. The nozzle is mounted on / Üem conical mandrel 86 so that its rear end rests against the shoulder 85 (see FIG. 7) * while the separator JO in the front nozzle section is arranged. The chuck 83 and the shaft 84 are concentric with a bush 87 which is arranged rigidly within the front arm 81 and has an inner wall 88 corresponding to the circumference of the end ring 14 of the brush.

The end ring 14 is inserted into the socket a distance determined by the engagement of the flange 60 with the rear end of the socket 87 is limited, x-jobei the engagement between the periphery of the end ring and the inner wall 88 of the socket for coaxial alignment between the nozzle l6 and its separator 70 with the Brush end ring 14 provides. The small tuft of hair 21, or another suitable tuft, can be inserted into the socket 87 beforehand have been used or only be used after the end ring has been arranged in the holder 87. In any case, when the brush parts are all connected to each other (see Fig. 7 the shaft 84 moves forward so that the nozzle 16 with the separating piece 70 in its front end concentrically in the end ring 14 and in the rear portion 21b of the brush hairs by a distance determined by the engagement of the front portion of the nozzle head 17 with the shoulders of the end ring is limited. The shaft 84 can then be returned

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are pulled, whereupon the assembled nozzle 16, the separator 70, the brush hairs 21 and the end ring 14 from the front bushing 87 is removed and the separating piece 70 is pulled forward out of the nozzle, with a corresponding, tool inserted into the end ring 14 and nozzle channel 22 is used. As already mentioned, the in 9 to 11 shown example, the tip 72a drilled out will.

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Claims (9)

Claims IJ brush, consisting of one extending axially from the front Nde of a tubular part extending tuft of hair, characterized in that an inner part (16) within an outer part (14) is arranged at a distance from this, and that the tuft of hair (21) within the annular Space between the inner (16) and the outer part (14) is attached, with a brush section (21a) extends axially beyond both parts. 2. Brush according to claim 1, characterized in that the hair of the inner brush section (21b) of the tuft of hair (21) are interconnected within the annular space by means of an adhesive, and that the brush hairs attached to the walls of the part delimiting the annular space by means of the adhesive are. J ». Brush according to Claim 1 or 2, characterized in that the outer part (14) has a non-circular cross-section and is conical towards its front end. 4. Brush according to claim J5, characterized in that the inner part (16) also tapers towards its front end. 5. Brush according to claim 4, characterized in that the outer part (14) has a cylindrical inner wall behind its conical section, and that the inner part has a head located behind the conical section which corresponds to the cylindrical inner wall of the outer part and is arranged within the same is. 309831/0357 " ^l4 " 6. Brush according to one of the preceding claims, characterized in that the inner part (16) has a channel (22) extending longitudinally therethrough. 7. Brush according to claim 6, characterized in that the front end of the inner part (16) extends in the longitudinal direction within the tuft of hair (21) and beyond the front end of the outer part (14). 8. A method for producing a brush, consisting of an outer part * an inner part arranged at a distance from the outer part inside the same, wherein an annular space is delimited between the inner and the outer part, and a tuft of hair which is inside the annular space is secured and extending axially from the front end of the outer part of, characterized in that the brush hairs are inserted into the outer part so that they extend axially beyond the front end of the outer part, said inner part having disposed therein a separator is inserted substantially coaxially into the outer part, the hairs of the brush being secured against the forwardly extending end between the inner and outer parts , and that the separator is then removed from the inner part. 9. The method according to claim 8, characterized in that an adhesive is applied to the brush hairs before the insertion of the inner part into the outer part and into the brush hairs. 309831/0357 Blank page